package com.dmc.util.util;


import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * IP工具类
 * 
 *
 */
public class IpUtil {

	/**
	 * 获取登录用户的IP地址
	 * 
	 * @param request
	 * @return
	 */
	public static String getIpAddr(HttpServletRequest request) {
		String ip = request.getHeader("x-forwarded-for");
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_CLIENT_IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_X_FORWARDED_FOR");
		}
		if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
			if(ip.equals("127.0.0.1") || ip.equals("0:0:0:0:0:0:0:1")){
				//根据网卡取本机配置的IP
				InetAddress inet=null;
				try {
					inet = InetAddress.getLocalHost();
				} catch (UnknownHostException e) {
					e.printStackTrace();
				}
				if(inet!=null){
					ip= inet.getHostAddress();
				}
			}
		}
		//对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
		if(ip!=null && ip.length()>15){
			if(ip.indexOf(",")>0){
				ip = ip.substring(0,ip.indexOf(","));
			}
		}
		return ip;
	}


}
